Vertically polarized omnidirectional antenna and dual-polarization omnidirectional antenna thereof

ABSTRACT

The invention discloses a vertically polarized omnidirectional antenna that is fed by a coaxial line including an inner conductor and an outer conductor. The vertically polarized omnidirectional antenna includes a main vibrator, an insulating medium, and a reference ground which are sequentially stacked and sequentially connected in a top-down manner. The main vibrator includes two vibrator pieces arranged in a crisscross, a straight line where an intersecting line between the vibrator pieces is located perpendicularly passes through the center of the reference ground, a base angle of each vibrator piece is set to be a corner cut, the inner conductor passes through the center of the reference ground and the insulating medium and is connected with the bottom of the main vibrator, and the outer conductor is connected with the reference ground. The vertically polarized omnidirectional antenna stably receives vertically polarized television signals from various directions through cooperatively interaction between the main vibrator, the insulating medium and the reference ground. The insulating medium is a key element of adjusting antenna impedance and being effective in impedance matching, so that an effect of receiving vertically polarized television signals from various directions by the antenna is greatly improved, the impedance is stable, and signal receiving stability and signal quality are greatly improved.

TECHNICAL FIELD

The invention relates to the technical field of antennas, in particularto a vertically polarized omnidirectional antenna and adual-polarization omnidirectional antenna thereof.

BACKGROUND ART

An antenna is a component used in radio equipment to transmit or receiveelectromagnetic waves. Any engineering system, which useselectromagnetic waves to convey information, such as wirelesscommunication, broadcasting, television, radar, navigation, electroniccountermeasure, remote sensing, radio astronomy, and the like, works bymeans of an antenna. With the popularity of wireless digital televisionsignals, television signals are received outdoors or in movement by moreand more people rather than limited in doors. When television signalsare received outdoors, especially in movement, since a signal tower isstationary while a position of a receive antenna is constantly changing,an omnidirectional antenna is required to ensure better reception.

The omnidirectional antenna exhibits 360° uniform radiation on ahorizontal pattern, which is commonly referred to as non-directionality,has a large coverage range, and exhibits to be a beam having a certainwidth in a vertical pattern. In general, the smaller the width of a lobeis, the greater the gain is. From the perspective of a current receiveantenna on the market, a single-polarization receive vibrator isgenerally used in receiving UHF signals, either horizontally polarizedor vertically polarized, and especially a vibrator of theomnidirectional antenna is mostly horizontally polarized. If avertically polarized electromagnetic wave signal emitted from atelevision tower is to be received, the antenna has to be repositioned,which is very inconvenient for an antenna installed outdoors.

SUMMARY OF THE INVENTION

In view of the above, the invention provides a vertically polarizedomnidirectional antenna with stable impedance and high signal receivingquality to overcome at least one of the above-mentioned defects in theprior art.

In order to solve the above existing technical problems, the inventionadopts technical solutions as follows.

The vertically polarized omnidirectional antenna that is fed by acoaxial line including an inner conductor and an outer conductorincludes a main vibrator, an insulating medium, and a reference groundwhich are sequentially stacked and sequentially connected in a top-downmanner. The main vibrator includes two vibrator pieces arranged in acrisscross, a straight line where an intersecting line between thevibrator pieces is located perpendicularly passes through the center ofthe reference ground, a base angle of each vibrator piece is set to be acorner cut, the inner conductor passes through the center of thereference ground and the insulating medium and is connected with thebottom of the main vibrator, and the outer conductor is connected withthe reference ground.

The vertically polarized omnidirectional antenna stably receivesvertically polarized television signals from various directions throughcooperatively interaction between the main vibrator, the insulatingmedium and the reference ground. The insulating medium is a component toposition a relative position of the main vibrator and the referenceground, as well as a key element of adjusting antenna impedance andbeing effective in impedance matching, so that an effect of receivingvertically polarized television signals from various directions by theantenna is greatly improved, the impedance is stable, and signalreceiving stability and signal quality are greatly improved. The mainvibrator includes two vibrator pieces arranged in a crisscross, that is,the vibrator pieces are vertically intersected with each other, and theintersected line superposes a center line of each vibrator piece and isperpendicular to a plane where the reference ground is located. A baseangle of the vibrator piece is cut to be a corner cut, that is, at leasta lower part of the vibrator piece is an inverted trapezoidal structureso as to ensure that a bottom edge of the vibrator piece can be instable and effective contact with the insulating medium. The mainvibrator is funnel-shaped from a side view and has the same receivingprinciple with a vibrator of a conical antenna, but is easier to processand manufacture and suitable for mass production compared with thevibrator of the conical antenna. The reference ground is made to ensurestability of antenna parameters.

In order to reduce the size of the main vibrator as much as possible, anupper part of a side edge of the vibrator piece is provided with aplurality of strip-shaped notches arranged parallel to each other andparallel to a horizontal plane. On one hand, the arrangement of thestrip-shaped notches can expand low-frequency receiving of a UHF signal,and on the other hand, can improve characteristic impedance of thevibrator to achieve best matching. Bandwidth and matching impedance areimproved by designing a position and a width of the strip-shapednotches. After simulation and measurement, when the width of thestrip-shaped notch is 5 mm to 10 mm and a length is 10 mm to 40 mm, thesignal receiving quality and stability are optimal.

The corner cut is chamfered from a middle part of a side edge of thevibrator piece to a middle part of a bottom edge of the vibrator suchthat a lower part of the vibrator piece is an inverted trapezoidalstructure. A design of the position of the corner cut, on one hand, canexpand bandwidth, improve pattern non-circularity, and further improve areceiving effect of the antenna; and on the other hand, allows thestrip-shaped notch to be arranged on an upper part of the vibratorpiece. A combined function of the two further improves the receivingeffect of the antenna.

In order to improve connection stability between the vibrator pieces,one vibrator piece of the main vibrator is provided with a gap extendingto a middle part along a center line in a top-down manner, the othervibrator piece is provided with a gap extending to the middle part alongthe center line in a bottom-up manner, and the two vibrator pieces forma crisscross structure by fitting the gaps in a crossed manner. In orderto further improve connection stability between the vibrator pieces, twosides of the gap are symmetrical toothed structures and are integrallyformed in a string shape, so as to improve directivity of signaltransmission, improve signal quality, and meanwhile lower assemblydifficulty.

In order to stabilize the antenna, the insulating medium is providedwith four supports, each support is provided with a slot, the slots ofthe four supports form a cross matched with the main vibrator, and thevibrator piece is inserted into the slot to be fixed. In a case wherethe antenna is installed and applied to a moving object such as avehicle, a ship or the like, the vibrator is ensured not to sway ordeform when the vehicle or the ship moves quickly so as to ensure areceiving effect.

An inner side surface of the slot is provided with a plurality ofprotrusions in order to further improve assembly stability of the mainvibrator, combing an impedance matching effect, and lower assemblydifficulty. Preferably, the support is provided with a fastenerpenetrating through the vibrator piece, so as to further improve astability degree of the antenna.

The reference ground is punched with a convex groove or a concave groovewhich is favorable to reduce the size of the reference ground so as tomeet a requirement of overall miniaturization for the antenna.

The vertically polarized omnidirectional antenna further includes a baseand a housing covered above the base. A closed cavity is formed betweenthe base and the housing. The main vibrator, the insulating medium, andthe reference ground are arranged in the cavity. The main vibrator isfixedly connected to an upper side of the insulating medium, thereference ground is fixedly connected to a lower side of the insulatingmedium and the insulating medium is fixedly connected to the basethrough the fastener so as to ensure integrity between the mainvibrator, the insulating medium and the reference ground and ensurestability of signal receiving.

An inner side of the base is further provided with a VHF vibratorarranged at a distance from the reference ground in a directionperpendicular to the reference ground. The VHF vibrator is a dipolevibrator and includes a pair of curved strap-shaped vibrator pieceswhich are arranged symmetrically. Projection of the strap-shapedvibrator pieces on a plane parallel to the reference ground is shown asa pair of symmetrically arranged arcs with arc centers opposite to eachother, which reduces a circumferential size of an integrated antenna andbetter achieves miniaturization of the integrated antenna under thepremise of ensuring a length and input impedance of the vibrator. Thearrangement of a layout surrounding the vertically polarizedomnidirectional antenna in the plane parallel to the reference groundand being arranged at a distance from the vertically polarizedomnidirectional antenna further ensures reception of a VHF frequencyband signal, and has no influence on signal reception of other antennavibrators.

A dual-polarization omnidirectional antenna that is provided with thevertically polarized omnidirectional antenna further includes ahorizontally polarized omnidirectional antenna arranged at a distanceabove the vertically polarized omnidirectional antenna. The horizontallypolarized omnidirectional antenna includes a substrate and a vibrator,the vibrator is connected to a signal processor through a coaxial cable,the vibrator includes a wiring port that is arranged at the center ofthe substrate and is used to connect with the coaxial cable and aplurality of vibrator units distributed on the substrate in acircumferential array around the center of the substrate, the vibratorunit includes a radiating unit and a conducting unit, the radiating unitincludes a first radiating sheet parallelly arranged on the substrateand a second radiating sheet vertically arranged on an edge of thesubstrate, an outer side edge of the first radiating sheet is connectedwith an inner side surface of the second radiating sheet, the conductingunit is parallelly arranged on the substrate, one end of the conductingunit is connected with one end of the first radiating sheet, and theother end is connected with the wiring port.

The vertically polarized omnidirectional antenna of the invention iscombined with the above-mentioned horizontally polarized omnidirectionalantenna, as long as a relatively smaller space is kept between the twoantennas, mutual interference between the two antennas will not becaused, and miniaturization development of the antenna is facilitated.

The dual-polarization omnidirectional antenna further includes a VHFvibrator arranged at a distance below the vertically polarizedomnidirectional antenna. The VHF vibrator is a dipole vibrator andincludes a pair of curved strap-shaped vibrator pieces which arearranged symmetrically. Projection of the strap-shaped vibrator pieceson a plane parallel to the reference ground is shown as a pair ofsymmetrically arranged arcs with arc centers opposite to each other,which reduces a circumferential size of an integrated antenna and betterachieves miniaturization of the integrated antenna under the premise ofensuring a length and input impedance of the vibrator. The arrangementof a layout surrounding the vertically polarized omnidirectional antennaor the horizontally polarized omnidirectional antenna in the planeparallel to the reference ground and being arranged at a distance fromthe vertically polarized omnidirectional antenna further ensuresreception of a VHF frequency band signal, and has no influence on signalreception of other antenna vibrators.

The dual-polarization omnidirectional antenna further includes a baseand a housing covered above the base. A closed cavity is formed betweenthe base and the housing. The horizontally polarized omnidirectionalantenna, the vertically polarized omnidirectional antenna, and the VHFvibrator are sequentially arranged in the cavity in a top-down manner.The horizontally polarized omnidirectional antenna is connected to thetop of the housing through the substrate to be fixed, the main vibratorof the vertically polarized omnidirectional antenna is fixedly connectedto an upper side of the insulating medium, the reference ground isfixedly connected to a lower side of the insulating medium, and theinsulating medium is fixedly connected to the base through the fastener,so as to ensure integrity between the main vibrator, the insulatingmedium and the reference ground and ensure stability of signalreceiving. The VHF vibrator surrounds an inner wall of the base.

Compared with the prior art, beneficial effects of the invention are asfollows. The vertically polarized omnidirectional antenna stablyreceives vertically polarized television signals from various directionsthrough cooperatively interaction between the main vibrator, theinsulating medium and the reference ground. The insulating medium is acomponent to position a relative position of the main vibrator and thereference ground, as well as a key element of adjusting antennaimpedance and being effective in impedance matching, so that an effectof receiving vertically polarized television signals from variousdirections by the antenna is greatly improved, the impedance is stable,and signal receiving stability and signal quality are greatly improved.At least a lower part of the vibrator piece is an inverted trapezoidalstructure so as to ensure that a bottom edge of the vibrator piece canbe in stable and effective contact with the insulating medium. The mainvibrator is funnel-shaped from a side view and has the same receivingprinciple with a vibrator of a funnel antenna, but is easier to processand manufacture and suitable for mass production compared with thevibrator of the funnel antenna. On one hand, the arrangement of thestrip-shaped notches can expand low-frequency receiving of a UHF signal,and on the other hand, can improve characteristic impedance of thevibrator to achieve best matching.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a vertically polarized omnidirectionalantenna.

FIG. 2 is an exploded view of the vertically polarized omnidirectionalantenna.

FIG. 3 is a cross-sectional view of the vertically polarizedomnidirectional antenna.

FIG. 4 is an enlarged view of an A part in FIG. 3.

FIG. 5 is a first front view of a vibrator piece.

FIG. 6 is a second front view of the vibrator piece.

FIG. 7 is a schematic diagram of a main vibrator.

FIG. 8 is a schematic diagram of an insulating medium.

FIG. 9 is a schematic diagram of a reference ground.

FIG. 10 is a second schematic diagram of the vertically polarizedomnidirectional antenna.

FIG. 11 is a schematic diagram of a dual-polarization omnidirectionalantenna.

FIG. 12 is a cross-sectional view of the dual-polarizationomnidirectional antenna.

Reference Numerals: 100 vertically polarized omnidirectional antenna;110 main vibrator; 111 vibrator piece; 1111 corner cut; 1112strip-shaped notch; 1113 gap; 120 insulating medium; 121 support; 1211slot; 130 reference ground; 131 convex groove; 200 horizontallypolarized omnidirectional antenna; 210 substrate; 221 wiring port; 2221radiating unit; 2222 conducting unit; 300 VHF vibrator; 400 coaxialline; 410 inner conductor; 420 outer conductor; 510 base; 520 housing

DESCRIPTION OF EMBODIMENTS

The drawings of the present invention are for illustration purpose onlyand are not intended to limit the present invention. Some components inthe drawings are omitted, enlarged or reduced for better illustratingthe embodiments, and sizes of these components do not represent sizes ofactual product. For those skilled in the art, it will be understood thatsome known structures in the drawings and descriptions thereof areomitted. The description of positional relationship in the drawings isfor illustration purpose only and is not intended to limit the presentinvention. The present invention will be further illustrated below withreference to specific embodiments.

Embodiment 1

As shown in FIGS. 1 to 3, a vertically polarized omnidirectional antenna100 that is fed by a coaxial line 400 including an inner conductor 410and an outer conductor 420 includes a main vibrator 110, an insulatingmedium 120, and a reference ground 130, which are sequentially stackedand sequentially connected in a top-down manner. The main vibrator 110includes two vibrator pieces 111 arranged in a crisscross, a straightline where an intersecting line between the vibrator pieces 111 islocated perpendicularly passes through the center of the referenceground 130, a base angle of each vibrator piece 111 is set to be acorner cut 1111, the inner conductor 410 passes through the center ofthe reference ground 130 and the insulating medium 120 and is connectedwith the bottom of the main vibrator 110, and the outer conductor 420 isconnected with the reference ground 130.

The vertically polarized omnidirectional antenna 100 of the presentembodiment stably receives vertically polarized television signals fromvarious directions through cooperatively interaction between the mainvibrator 110, the insulating medium 120 and the reference ground 130.The insulating medium 120 is a component to position a relative positionof the main vibrator 110 and the reference ground 130, as well as a keyelement of adjusting antenna impedance and being effective in impedancematching, so that an effect of receiving vertically polarized televisionsignals from various directions by the antenna is greatly improved, theimpedance is stable, and signal receiving stability and signal qualityare greatly improved. The main vibrator 110 includes two vibrator pieces111 arranged in a crisscross, that is, the vibrator pieces 111 arevertically intersected with each other, and the intersected linesuperposes a center line of each vibrator piece 111 and is perpendicularto a plane where the reference ground 130 is located. A base angle ofthe vibrator piece 111 is cut to be a corner cut 1111, that is, at leasta lower part of the vibrator piece 111 is an inverted trapezoidalstructure so as to ensure that a bottom edge of the vibrator piece 111can be in stable and effective contact with the insulating medium 120.The main vibrator 110 is funnel-shaped from a side view and has the samereceiving principle with a vibrator of a funnel antenna, but is easierto process and manufacture and suitable for mass production comparedwith the vibrator of the funnel antenna.

As shown in FIG. 4, in order to reduce the size of the main vibrator 110as much as possible, an upper part of a side edge of the vibrator piece111 is provided with a plurality of strip-shaped notches 1112 arrangedparallel to each other and parallel to a horizontal plane. On one hand,the arrangement of the strip-shaped notches 1112 can expandlow-frequency receiving of a UHF signal, and on the other hand, canimprove characteristic impedance of the vibrator to achieve bestmatching. A receiving effect can be optimal by designing a position anda width of the strip-shaped notches 1112. After simulation andmeasurement, when a width a of the strip-shaped notch 1112 is 5 mm to 10mm and a length b is 10 mm to 40 mm, the signal receiving quality andstability are optimal.

As shown in FIG. 4, the corner cut 1111 is chamfered from the middle ofa side edge of the vibrator piece 111 to the middle of a bottom edge ofthe vibrator such that a lower part of the vibrator piece 111 is aninverted trapezoidal structure. A design of the position of the cornercut 1111, on one hand, can expand bandwidth, improve patternnon-circularity, and further improve a receiving effect of the antenna;and on the other hand, allows the strip-shaped notch 1112 to be arrangedon the upper part of the vibrator piece 111. A combined function of thetwo further improves the receiving effect of the antenna.

In order to improve connection stability between the vibrator pieces111, one vibrator piece 111 of the main vibrator 110 is provided with agap 1113 (shown in FIG. 5) extending to a middle part along a centerline in a top-down manner, the other vibrator piece 111 is provided witha gap 1113 (shown in FIG. 6) extending to the middle part along thecenter line in a bottom-up manner, and the two vibrator pieces 111 forma crisscross structure (shown in FIG. 7) by fitting the gaps 1113 in acrossed manner. In order to further improve connection stability betweenthe vibrator pieces 111, as shown in FIG. 4, two sides of the gap 1113are symmetrical toothed structures and are integrally formed in a stringshape, so as to improve directivity of signal transmission, improvesignal quality, and meanwhile lower assembly difficulty.

In order to stabilize the antenna, as shown in FIG. 8, the insulatingmedium 120 is provided with four supports 121, each support 121 isprovided with a slot 1211, the slots 1211 of the four supports 121 forma cross matched with the main vibrator 110, and the vibrator piece 111is inserted into the slot 1211 to be fixed. In a case where the antennais installed and applied to a moving object such as a vehicle, a ship orthe like, the vibrator is ensured not to sway or deform when the vehicleor the ship moves quickly so as to ensure a receiving effect.

As shown in FIG. 3, an inner side surface of the slot 1211 is providedwith a plurality of protrusions in order to further improve assemblystability of the main vibrator 110, combing an impedance matchingeffect, and lower assembly difficulty. Preferably, the support 121 isprovided with a fastener penetrating through the vibrator piece 111, soas to further improve a stability degree of the antenna.

As shown in FIG. 9, the reference ground 130 is punched with a convexgroove 131 or a concave groove which is favorable to reduce the size ofthe reference ground 130 so as to meet a requirement of overallminiaturization for the antenna.

As shown in FIG. 10, the vertically polarized omnidirectional antenna100 further includes a base 510 and a housing 520 covered above the base510. A closed cavity is formed between the base 510 and the housing 520.The main vibrator 110, the insulating medium 120, and the referenceground 130 are arranged in the cavity. The main vibrator 110 is fixedlyconnected to an upper side of the insulating medium 120, the referenceground 130 is fixedly connected to a lower side of the insulating medium120, and the insulating medium 120 is fixedly connected to the base 510through the fastener, so as to ensure integrity between the mainvibrator 110, the insulating medium 120 and the reference ground 130 andensure stability of signal receiving.

An inner side of the base 510 is further provided with a VHF vibrator300 arranged at a distance from the reference ground 130 in a directionperpendicular to the reference ground 130, the VHF vibrator 300 is adipole vibrator and includes a pair of curved strap-shaped vibratorpieces 111 which are arranged symmetrically. Projection of thestrap-shaped vibrator pieces 111 on a plane parallel to the referenceground 130 is shown as a pair of symmetrically arranged arcs with arccenters opposite to each other, which reduces a circumferential size ofan integrated antenna and better achieves miniaturization of theintegrated antenna under the premise of ensuring a length and inputimpedance of the vibrator. The arrangement of a layout surrounding thevertically polarized omnidirectional antenna 100 in the plane parallelto the reference ground 130 and being arranged at a distance from thevertically polarized omnidirectional antenna 100 further ensuresreception of a VHF frequency band signal, and has no influence on signalreception of other antenna vibrators.

Embodiment 2

As shown in FIG. 11, a dual-polarization omnidirectional antenna that isprovided with the vertically polarized omnidirectional antenna 100 asdescribed in the above embodiment further includes a horizontallypolarized omnidirectional antenna 200 arranged at a distance above thevertically polarized omnidirectional antenna 100. The horizontallypolarized omnidirectional antenna 200 includes a substrate 210 and avibrator, the vibrator is connected to a signal processor through acoaxial cable, the vibrator includes a wiring port 221 that is arrangedat the center of the substrate 210 and is used to connect with thecoaxial cable and a plurality of vibrator units distributed on thesubstrate 210 in a circumferential array around the center of thesubstrate 210, the vibrator unit includes a radiating unit 2221 and aconducting unit 2222, the radiating unit 2221 includes a first radiatingsheet parallelly arranged on the substrate 210 and a second radiatingsheet vertically arranged on an edge of the substrate 210, an outer sideedge of the first radiating sheet is connected with an inner sidesurface of the second radiating sheet, the conducting unit 2222 isparallelly arranged on the substrate 210, one end of the conducting unit2222 is connected with one end of the first radiating sheet, and theother end is connected with the wiring port 221.

The vertically polarized omnidirectional antenna 100 of the presentembodiment is combined with the above-mentioned horizontally polarizedomnidirectional antenna 200, as long as a relatively smaller space iskept between the two antennas, mutual interference between the twoantennas will not be caused, and miniaturization development of theantenna is facilitated.

The dual-polarization omnidirectional antenna further includes a VHFvibrator 300 arranged at a distance below the vertically polarizedomnidirectional antenna 100. The VHF vibrator 300 is a dipole vibratorand includes a pair of curved strap-shaped vibrator pieces 111 which arearranged symmetrically. Projection of the strap-shaped vibrator pieces111 on a plane parallel to the reference ground 130 is shown as a pairof symmetrically arranged arcs with arc centers opposite to each other,which reduces a circumferential size of an integrated antenna and betterachieves miniaturization of the integrated antenna under the premise ofensuring a length and input impedance of the vibrator. The arrangementof a layout surrounding the vertically polarized omnidirectional antenna100 or the horizontally polarized omnidirectional antenna 200 in theplane parallel to the reference ground 130 and being arranged at adistance from the vertically polarized omnidirectional antenna 100further ensures reception of a VHF frequency band signal, and has noinfluence on signal reception of other antenna vibrators.

As shown in FIG. 12, the dual-polarization omnidirectional antennafurther includes a base 510 and a housing 520 covered above the base510. A closed cavity is formed between the base 510 and the housing 520.The horizontally polarized omnidirectional antenna 200, the verticallypolarized omnidirectional antenna 100, and the VHF vibrator 300 aresequentially arranged in the cavity in a top-down manner. Thehorizontally polarized omnidirectional antenna 200 is connected to thetop of the housing 520 through the substrate 210 to be fixed, the mainvibrator 110 of the vertically polarized omnidirectional antenna 100 isfixedly connected to an upper side of the insulating medium 120, thereference ground 130 is fixedly connected to a lower side of theinsulating medium 120, and the insulating medium 120 is fixedlyconnected to the base 510 through the fastener, so as to ensureintegrity between the main vibrator 110, the insulating medium 120 andthe reference ground 130 and ensure stability of signal receiving. TheVHF vibrator 300 surrounds an inner wall of the base 510.

It is apparent that the above embodiments of the present invention aremerely examples for clear illustration, and are not intended to limitthe implementations of the present invention. Modifications or changesin other various forms can be made by those ordinary skilled in the arton the basis of the above description. There is neither need norexhaustion for all implementations. Any modification, equivalentsubstitution, improvement, or the like within the spirit and principleof the invention should be included in the scope of the claims of theinvention.

1. A vertically polarized omnidirectional antenna that is fed by acoaxial line including an inner conductor and an outer conductor, thevertically polarized omnidirectional antenna comprising: a mainvibrator; an insulating medium; and a reference ground, wherein the mainvibrator, the insulating medium, and the reference ground aresequentially stacked and sequentially connected in a top-down manner,the main vibrator includes two vibrator pieces arranged in a crisscross,a straight line where an intersecting line between the vibrator piecesis located perpendicularly passes through the center of the referenceground, a base angle of each vibrator piece is set to be a corner cut,the inner conductor passes through the center of the reference groundand the insulating medium and is connected with the bottom of the mainvibrator, and the outer conductor is connected with the referenceground.
 2. The vertically polarized omnidirectional antenna according toclaim 1, wherein an upper part of a side edge of the vibrator piece isprovided with a plurality of strip-shaped notches arranged parallel toeach other and parallel to a horizontal plane.
 3. The verticallypolarized omnidirectional antenna according to claim 2, wherein thestrip-shaped notch has a width of 5 mm to 10 mm and a length of 10 mm to40 mm.
 4. The vertically polarized omnidirectional antenna according toclaim 1, wherein the corner cut is chamfered from a middle part of aside edge of the vibrator piece to a middle part of a bottom edge of thevibrator such that a lower part of the vibrator piece is an invertedtrapezoidal structure.
 5. The vertically polarized omnidirectionalantenna according to claim 1, wherein one vibrator piece of the mainvibrator is provided with a gap extending to a middle part along acenter line in a top-down manner, the other vibrator piece is providedwith a gap extending to the middle part along the center line in abottom-up manner, and the two vibrator pieces form a crisscrossstructure by fitting the gaps in a crossed manner.
 6. The verticallypolarized omnidirectional antenna according to claim 5, wherein twosides of the gap are symmetrical toothed structures.
 7. The verticallypolarized omnidirectional antenna according to claim 1, wherein theinsulating medium is provided with four supports, each support isprovided with a slot, the slots of the four supports form a crossmatched with the main vibrator, and the vibrator piece is inserted intothe slot to be fixed.
 8. The vertically polarized omnidirectionalantenna according to claim 7, wherein an inner side surface of the slotis provided with a plurality of protrusions.
 9. The vertically polarizedomnidirectional antenna according to claim 1, wherein the referenceground is punched with a convex groove or a concave groove.
 10. Adual-polarization omnidirectional antenna that is provided with thevertically polarized omnidirectional antenna according to claim 1, thedual-polarization omnidirectional antenna further comprising: ahorizontally polarized omnidirectional antenna arranged at a distanceabove the vertically polarized omnidirectional antenna, wherein thehorizontally polarized omnidirectional antenna includes a substrate anda vibrator, the vibrator is connected to a signal processor through acoaxial cable, the vibrator includes a wiring port that is arranged atthe center of the substrate and is used to connect with the coaxialcable and a plurality of vibrator units distributed on the substrate ina circumferential array around the center of the substrate, the vibratorunit includes a radiating unit and a conducting unit, the radiating unitincludes a first radiating sheet parallelly arranged on the substrateand a second radiating sheet vertically arranged on an edge of thesubstrate, an outer side edge of the first radiating sheet is connectedwith an inner side surface of the second radiating sheet, the conductingunit is parallelly arranged on the substrate, one end of the conductingunit is connected with one end of the first radiating sheet, and theother end is connected with the wiring port.